Vat dyestuffs



Patented Aug. 8, 1950 VAT I )YESTUFFS 7 Jacob Koch, Basel,- Switzerland, assignor to Ciba Limited, Basel, Switzerland No Drawing. Application-January 27, 1947, Se-

rial No. 724,708. In Switzerland February 1,

sclaiihs. (01. 260-312) According to this invention valuable vat dyestuffs are made by treating a compound, of the general formula in which R1 represents a pyrazolanthroneradical, R2 represents an anthraquinone radical containing an acylamino group as a substituent, and in which the position of the NH-group connecting the two radicals relatively to'the pyrazole ring and to the acylamino-group in at least one of the nuclei R1 and R2 is 1:5, with 'a condensing agent of the typeof aluminium chloride. t

The compounds of the above generaliformula serving as starting materials may be prepared in known manner, for example, from halogen-acylamino anthraguinones and aminopyrazolan-j thrones or from amino-acylamino-anthraquinones and halogenpyrazolanthrones. In order that the connecting NH-group in at least one of the two nuclei shall occupy the 5-position relatively to the pyrazole ring connected in the 1-position or to the acylamino group in the 1-position, it is necessary, in order to obtain the starting materials of the invention, to start either from 5-halogenor 5-amino-l-acylaminoanthraquinones or 5-aminoor 5-halogen-1:9 pyrazolanthrones. y 7 v It is of advantage to use starting materials which are substituted in the pyrazole ring and contain as an N-substituent, for example, an

alkyl group, advantageously an alkyl group containing at the most 4 carbon atoms, especially a methyl, ethyl or isopropyl group. As acylamino groups the starting materials may contain, f or ex ample, an amino group acylated by a carboxylic acid, advantageously an acylated amino group whose acyl radical may correspond, for example, to the radical of an aliphatic carboxylic acid, such as acetic acid, of a heterocyclic carboxylic amino-N-methyl 1:9 pyrazolanthrone, 5-(8'- benzoylamino 1 anthraquinonyl) amino- N methyl-1 Q-pyrazolanthrone and 5- (4 -benzoylamino- 1' -anthraquinony1) amino N methyllz9-pyrazolanthrone, in which compounds the N-methyl group may be attached to the nitrogen atom in the 9-position or to that in the 1-position and also the corresponding compounds'containing an alkyl or is'opropyl group instead of the methyl group. As condensing agents theremay be used in the present process the known combinations of aluminium chloride with diluents'or fluxing agents,

. for examples, mixtures with sodium chloride, with nitromethane, with pyridine or' other tertiary bases or hydrochlorides thereof, addition compounds of aluminium chloride" with sulfur dioxide,

if desired, in admixture with sodium chloride, and

. printing a very wide variety of materials, for exacid, such as pyridine-3-carboxylic acid,'or;ad-

ample, fibrous materials. and especially cellulose fibres, such as cotton, linen, artificial silk and staple fibres of regenerated cellulose. They can also be converted by known methods into "their corresponding leuco-ester salts, for example, of sulfuric acid, and used for dyeing and printing by. the methods usual for. this class of dyestuffs. v i

The following examplesillustrate the invention, the parts being by weight unless otherwise stated, and the relationship of parts by weight to parts by volume being the same as that of the kilogram to the liter: a

4 parts of the condensation product from l-amino-N-methyl-l :9-pyrazolanthrone .and 1- chloro-5-benzoylamino -anthraquinone are introduced into a thin homogeneous melt or" 33 parts of pulverized aluminium chloride and 8.8 parts of dry pulverized sodium chloride at about 120 C., and then the whole is stirred for a further hour at 120-130 'C. The thickly fluid melt is then introduced into 400 parts of a mixture of ice and water.

"The whole is rendered acid to Congo by means of" hydrochloric acid, boiled, and filtered with suction. The residue is washed neutral and dried.

If necessary the product may be further purified 3 bluish red coloration. It dyes cotton from a red brown alkaline hydrosulfite vat yellow-brown tints of great purity and excellent properties of fastness.

The starting material used in this example has the formula 4 parts of the condensation product from 4 amino N me l p ra la h one and 'l-chloro-5 benaoylan ino-anthraquinone are introduced into a thin homogeneous melt of 33 parts ofdry pulverized aluminium chloride and Parts 9 dry P idin h chlorid a ab ut nd then h w l i t r d fo a u ther hour at 120130 C. The thinly fluid melt is then stirred into 400 parts or a mixture of ice and t r, t ho r n ed acid -1 ngo with hydrochloric acid, and filtered with suction. The residue is washed neutral and dried. l-t may, when necessary be reprecipitated from con-' centra'ted sulfuric acid and then vatted.

The dyestufiso obtained is identical with that described in Example 1.

EXAMPLE 3 5 parts of the condensation product from 4 amino N methyl 1:9 pyrazolanthrone and l-chloro-B-benzoylamino-anthraquinone are 6 introduced into a thin homogeneous melt of- 33 4 parts of dry pulverized aluminium chloride and 12 parts of pyridine at about 110 C., and then the whole is stirred for a further hour at 120-130 C. The product is worked up as described in Example 2.

The dyestuff so obtained is identical with that described in Example 1.

26.6 parts of dry pulverized aluminium chloride are heated to about 100 C. 12.2 parts of nitroinethane are added whereby the temperature rises about 10 C. and the Whole is then cooled to about C. 4 parts of the condensation product from 4-amino-N-methyl-pyrazolanthrone and 1eehloro5-benzoylamino-anthraquino rieare then introduced into the brown liquid suspension and the whole is stirred for 2 hours at 80-90 Q. The melt is thereupon stirred into 500 parts of water, the whole is heated to 70 C. and rendered acid to Congo with hydrochloric acid, and filtered with suction. The residue is washed neutral and dried. It may, when necessary, be reprecipitated from concentrated sulfuric acid and then vetted.

The dyestufi so obtained is identical with that described in Example 1.

EXAMPLE 5 12 parts of the condensation product from l 2x11 1 110- N methyl 12,9 pyrazolanthrone and 1-chlor 5-benzoylamin0-anthraquinone are introduced at lQQ-llQ. G. into. a thin homogeneous melt. which has been prepared by passing dried sulfur dioxide gas over a mixture of '75 parts of dry pulverized aluminium chloride and l dparts of dry pulverized sodium chloride. The whole is stirred for a further hour at -110 C. while continuing to introduce sulfur dioxide. The fluid melt. is then introduced into. a mixture of 1000, parts of water and 2.70 parts of a caustic soda solution of 3,6. B. The suspension, which has become warm, is boiled, rendered acid to, Congo with hydrochloric acid and filtered with suction. The residue is washed, extracted at the boil with 1000. parts, of hydrochloric acid of .0 per ent. st ength. filte ed with su io a he neutral, and dried. When necessary, it maybe fur her p ed by b n vet T t tu so taine s identica wi h t.

des ibed mp 1;.

Th dres u t sho -1: in t e tablebelow can. b e eParedae Qrd -ne to t e ame method. In this table. th r r ndic ted in the first colu n the omponents. nec ssar for the manufa ur i h starting; materials and in the. second column the olor of s artin m terials dissolved in con-, eentr-ated sulibi fic. acid, while the. properties. of the r ultin fin l, roduct are shown in the last 8; columns.-

Table Color 0ft%Stl1 I:t-, I fl(glollor of dthe. I C 1 h f h mg ma ria a pro uct oor oft e i S tide of the o-ompqngqa- Qt; the materlmk dissolved in dissolvedin vat dyeingon; cotton;

cone,E SO4 j conc .H 2SO4 I i-chloro- .-ethy1-1:9-py razo1anth one and 1-amino-5-ben- Red bluish red red-brown y llow-brown.

' zoyl-a'luiin'o-anthraqumohe. 1 e q -N- v y r w aQ e r ee a d; l-am eois red; lb r D beh'ioy1aininoanthra'gui1i61ie j e fi-chlofosN-niethyll:.9-pyrazolanthrone (meltingpoint 251-. gr red dish re i red-brown.

253% C.) and; 1-amino 4-bcnzoyl anthraquinpne. E fi-chloro-N-methyl-1i9-pyrazo1anthijone (melting1p0iut2 5b yellowl. "blue; 'red-brown orange.

253 C.) and l-amino-fi-benzoyl-amino-aiithraquinone. i zfih l i l r t TY WW Q (m P in nee e-fi-r-mrrr u l esl -www- 19.0; 253C.) and l-aminodbenzoyl-atnino-anthraquinione.

Note'at end or table.

.aTdblG-COIltiDllGd I Color of the stalirtfiiollor oighe '0 1' Y mgmaena apro uc ooroi e aeo V e j Components of t stmng matem] dissolved in dissolved in vat dyeing on cotton conc,H2S04 conc.'H2SO 5chloro-N-methyl-1:Q-pyrazolanthrone of the formula s-rmn i l t rod red-brown.

I (melting point 230-231 C.) and l-amino -i-benzolyaminoanthraquinone.

5-ch1oro-N-methyl-1g9-pyrazolanthrone (melting point 230- yellow.-. h'lmred brown--- orange.

231 C.) and l-ammo-5-benzoyl-amino anthraquinone. 7' w 5-ch1oro-N-methyl-l :Q-pyrazolanthrone (melting point 230* green do red 1 Do. 231 C.) and 1-am1no-8-benz9yl amino-anthraquinone. r 5-chloro-N-ethy1-1:Q-pyrazolanthrone and l-amino i benfln violet do red-brown.

zoyl-amino-anthraquinoner 5-chloro-N-ethyl-1:Q-pyrazolanthrone and- 1-amino-5-benye11ow green-blue.--" red-brownorange.

zoyl-amino-anthraqumone. v s-chloro-N-ethyl-l:9-pyrazolanthrone and l-amino-S-bengreen. grey-blue red Do. zoyl-amino-anthraquinone. fi-chloro-N-isopropyl-l:9-pyrazo1anthrone ,and l amino-4- dn violet" dn red-brown,

benzoyl-amino-anthraquinone.v 5-chloro-N-1sopropyl-l:Q-pryazolanthrone and 1-amino-5- yellow green-blue red-brown--- orange.

benzoyl-amino-anthraquinone. 5-chloro-N-isopropyl-1:Q-pyrazolanthrone and l-amino-S- green blue do Do,

benzoyl-amino-anthraquinone. S-chloro-N-methyl-l:Q-pyrazolanthrone and l-amino-S-benbrownish greeu violet r yellow-brown.

zoyl-amino-anthraquinone. 8-chloro-N-ethy1-l:9-pyrazo1anthrone and l-amino-fi-benyel1ow-brow11.- b Do. zoyl-amino-anthraquinone. 1 1 g i 8-chloro-N-is0propyl-l:9-pyrazolanthrone and l-amino-S- brown-yellow.-- I violeL- ,Do. benzoyl-amino-anthraquinone. 1

NOTE: The alkyl radical in the foregoing pyrazolanthrone is always linked to the nitrogen atom in the 1-position if-nothing else is indicated.

EXAMPLE6 1 I,

2 parts of the dyestufi' obtained as described in Example 1 are stirred with 8 parts by volume of caustic soda solution of 36 B. in 200 parts of water at 50 C., and vatted by the addition of 4 parts of sodium hydrosulfite. This stock vat is added to a dyebath consisting of-2'000 parts of water which contains 4 parts by volume of caustic soda solution of 36 Be. and 2 partsof sodium hydrosulfite. 100 parts of cotton areentered at 40 C., after A; hour parts of sodiumchloride are added, and dyeing is carried on at -50 C. for 1 hour. The cotton is then squeezed, oxidized in air, rinsed, acidified, again rinsed, and soaped at the boil. Thematerial is dyed in fast yellowbrown tints. M

What'I claiin is:

1. A vatdyestuff of the general formula wherein R1; stands; for a lz pyraz olanthrone radical and R2 stands for a l-benzoylaminoanthraquinone radical, wherein at .least one. of; said radicals carries the" g'rou p of thefor'rnnla in 5-position; andwherein the direct bond between R1 and R2 interconnects fi-standing carbon atoms adjacent to the NH- group connecting a-positions of R1 and R2, the remaining carbon atoms in R1 and R2 being free from substituents.

2. A vat dyestuif of the general formula wherein R1 stands for a N-alkyl-lzQ-pyrazolanthrone radical and R2 stands for a l-benzoylaminoanthraquinone radical, wherein at least one of said radicals carries the --NH-- group of the formula in 5-position, and wherein the direct bond between R1 and R2 interconnects p-standing carbon atoms adjacent to the NI-I-- group connecting a-positions of R1 and R2, the remaining carbon atoms in R1 and R2 being free from substituents.

3. A vat dyestuif of the general formula wherein two Xs stand for hydrogen and the third X stands for a radical of the general formula Y 0 NH-benzoy wherein two Ys stand for hydrogen and the third Y stands for a S-imino-N-alkyl-i:Q-pyrazolanthrone radical and wherein a direct carbon-carbon bond exists between the two fl-standing car bon atoms adjacent to the imino group connecting the pyrazolanthrone and anthraqumone nuclei.

5. A vat dyestuff of the general formula I NH-benzoyl wherein two Y's stand for hydrogen and the third Y stands for .a radical of the general formula and wherein a direct :carbon-carbon bond exists between the two iii-standing carbon atoms adjacent to the imino group connecting the pyrazolanthrone and anthraquinone nuclei.

6. A vat dyestufi of the general formula wherein two Y's stand for hydrogen and the third Y stands for a radical of the general formula and wherein a direct carbon-carbon bond exists between the two fl-standing carbon atoms adja cent to the imino group connecting the pyrazolanthrone and anthraqu'inone nuclei.

9. The vat dyestufi of the formula JACOB .KOCH.

REFERENCES CITED The following referencesnre of record in the file of this patent:

' STATES PATENTS Number Name Date 1,877,884 .Kalischer Sept. ,20, 1932 2,136,133 Hauser ,Nov. 8, 193.8 

1. A VAT DYESTUFF OF THE GENERAL FORMULA
 7. THE VAT DYSTUFF OF THE FORMULA 